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AN3276 Datasheet(PDF) 8 Page - STMicroelectronics

Part # AN3276
Description  ST solution for efficiency improvement in PFC applications
PDF  22 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3276 Datasheet(HTML) 8 Page - STMicroelectronics

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The new ST solution - BC2: energy recovery circuit
AN3276
8/22
Doc ID 17975 Rev 1
2.2
Phase timing description
Figure 7.
Equivalent timing per phase
The winding ratios m1 and m2 versus NP winding are those of the windings NS1 and NS2
respectively.
L
)
m
(
V
m
V
dt
dI
mains
OUT
TR
·
+
·
+
-
=
2
2
1
2
2
1 + m
m
V
V
main
OUT
·
-
)
m
1
(
m
V
1
1
mains
-
·
-
)
m
1
(
m
V
V
2
2
mains
OUT
+
·
+
2
2
OUT
mains
m
m
1
)
V
V
(
·
+
-
)
m
1
(
)
m
1
(
I
1
2
RM
-
+
·
⎟⎠
⎞
⎜⎝
⎛
-
+
·
+
-
1
2
1
mains
OUT
m
1
m
m
V
V
L
)
m
1
(
V
m
V
dt
dI
2
2
mains
2
OUT
DB
·
+
·
+
-
=
1
2
1
1
2
1
·
·
2
m
m
m
m
m
I RM ·
-
-
-
V0UT
I0
I0
I0
I1
I1
I1
-IRM
(IRM +I0)(1+m2)
tD
1
tD
2
I0
I
TR
V
TR
V
TR
V
L
V
L
V
DB
V
DB
I
D2
I
D1
I
DB
I
mains
t
t
t
t
t
t
t
t5
t4
t3
t2
t1
t0



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